Measuring instrument.



H. E. S. CHAYES.

MEASURING INSTRUMENT.

APPLICATION FlLED NOV. 12. 1913.

1,184,322. Pafented May 23, 1916.

I l l ll111 MH 1 1lll llll jlm l m r \HE COLUMBIA PLANOGRAPH ,cO., WASHINGTON, n. C.

C NT @FFTQE.

HERMAN E. S. CHAYES, NEW YORK, N. Y.

MEASURING INSTRUMENT.

Specification of Letters Patent.

Patented May 23, 1916.

Application filed November 12, 1913. Serial No. 800,553.

, To all whom it may concern:

Be it known that I, HERMAN E. S. Gimme, a citizen of the United States of America, and resident of New York. in the county of New York and State of New York, Whose post-ofiice address is No. 576 Fifth avenue, New York, N. Y., have invented certain new and useful Improvements in Measuring Instruments, of which the following is a specification.

This invention relates to new and useful improvements in measuring instruments, particularly adapted for use in connection with certain dental operations.

An object of the invention is to provide an instrument with means for holding certain tools in adjustably spaced relation, and with means for fixing the parts in such adjusted relation.

. Another object is to provide an instru ment accomplishing'the end just stated, in

' which the over-all dimensions are small, and

in which wide ranges of adjustment are possible wlthout increase 1n the over-all dimenslons of the instrument.

Other objects and aims of the invention,

more or less broad than those stated above, together with the advantages inherent, will be in part obvious and in part specifically referred to in the course of the following description of the elements, combinations,

arrangements of parts, and applications of principles constituting the invention; and the scope of protection contemplated will appear from the claims.

In the accompanying drawing, which is to be taken as a part of this specification,

. and 'in which I have shown one of the var on the line 4.4 of Fig. 2, looking in the direction of the arrows.

' rious possible embodiments of this invention as at present preferred: Figure 1 is an elevation on an enlarged scale, of an instrument embodying my invention; Fig. 2 is a bottom plan view of the same; Fig. 3 is a bottom plan view of one of the members of the instrument, with certain parts in section; and Fig. l-is a sectional view taken Referring to the numerals on the drawing, there is shown at 6 one of the two principal parts of the instrument, comprising an oblong bar having a side surface indicated at 7, and provided with calibrations as shown in Fig. 1, and having also a bot-' tom surface shown in Fig. 3 and provided with calibrations as shown in said Fig. 3.

The member 6 is provided with a dove-tail shdeway 8, and also with a trough 9 sunk below the level of the floor of this slideway 8. In one end of this trough 9 is secured a cylindrical bearing 10, through which passes a screw 11 having an enlarged thumbpiece 12. This screw is free to rotate within the bearing 10 and trough 9, but is held against longitudinal movement in one direction by means of a collar 14 that is fixed in place as by means of a set screw 15, the screw being restrained against longitudinal movement in the opposite direction by the thumb-piece 12. The complementary part of the instrument is indicated by the numeral 16 in Figs. 1, 2 and 4, and comprises in this instance an oblong bar provided with a longitudinal dove-tail portion corresponding to the dove-tail 'slideway in the member 6, so that the member 16 may slide longitudinally relatively to the member 6. This relative sliding movement is accomplished by rotation of the screw 11 because of the engagement of said screw with an internally threaded cylindrical member 17 fixed within trough 18 of the member 16 preferably integral with the latter and extending into trough 9 of the member 6, these troughs 9 and 18 completely inclosing the screw 11.

From the foregoing description it will be evident that upon manipulation of the screw 11, a relative sliding movement may be brought about between the members 6 and 16. The members 6 and 16 may be set in any relative position to which they may be adjusted as by means of a headed screw 20 that extends through the member 16 and bears upon the opposed surface of the member 6 through an interposed disk 21 of relatively soft metal or material which is set intothe enlarged inner end of the opening through which said screw is threaded. As before stated, the face 7 of the member 6 is provided with calibrations as shown in Fig. 1, and the underface of this member 6, shown in Fig. 3, is also provided with calibrations as shown in said Fig. 3. These calibrations, in the present instance, represent a given unit oflength, as, for instance, millimeters; and the complementary member 16 carries on its face 22,shown in Fig. 1, a plurality of index notches 24:, 24 and 24, for accomplishing readings of the calibrations on the face 7. At one end of the member 6, and on the edge opposite the calibrated edge thereof, is a clamping member 25, including line for this socket or for the post ortool.

which may be secured therein. Similarly, I provide other clamping members 25 spaced apartdongitudinally on the face 7 of the member 6, both of them controlled by screws "26, and being arranged and operating in the *samemanner as the one already described. The member 16 is likewise provided with a plurality of clamping members 25, controlled by screws 26, and forming, in con nection with transverse depressions in the member 16, sockets for posts or tools similar to those which are adapted to be held within th'e'corresponding portions of the member 6. In the form shown, there are'three of these i post or'tool holding portions inthe member' 16, spaced ap art longitudinally, and to each of these tool holding portions is appropriated one of the index notches 24. Furthermore, the perpendicularedge 30 is also "intended to be used at times as an index in thereadin'gof the calibrations on the underfac'e of the member 6, shown in Fig.6, as willhereinafter be described.

In use, supposing that a post was'held by the clamping member at the extreme lefthand of-the'member 6 as'sliown in Fig. 1, and that another post was held by the "clamping member at the left-hand end of *the member16,as shown in Fig. 1. If the screw 11 is -manipulated so that the index notch appropriated to the clamping member at tlie left ofthe member 16, indicatedas 24=-galines withthe edge 29 ofthe member 6, then it isknown that the distance between the centers of'the' posts held by these two clamping members is say seven 'millim'eters.

' :If the screw 11 be manipulatedso thatthe notc'h 24 travelsto the right and to the first calibration shown in 'Fig. 1, then the Histance'from post to post will'be, -say, ei ght millimeters, and so on. If the 'measurementbe of somedistance greater than ten millimeters and less than twenty-five, then,

leaving one of thepostsor tools inthe clamping portion at the left-hand end of member '6 (Fig. 1), the other post or tool isj'placed injthe intermediate clamping por- "tion ofmembe'r 16 identified by the index notch 24". -'And if the measurement be of a distance between 'twenty five and forty millimeters, then that one of the'posts held by the clamping portion on the extreme "left of member "is" left in place, and the other ters P-aitent, "is

post is placed within the clamping portion of member 16 identified by the index notch 2?. ment, we are in eilect reading the length of thehypotenuse of a right angle triangle in gether toward the left (Fig. 3). If it is desiredtomake a measurement of more than forty millimeters, one of the posts or other parts is pla'ce'd in the clamping portion at the extreme-right hand end of-the member 6 (Fig. 1),:and the otherzpost is'held'in the Inasmuch'asin making such measureclamping portion of member 16 identified by the indexinotch 24 andthe edge 30 of the member 16 is used'as an index for'reading the calibrations tupon theunderface of themember 6 (Fig. 3).

It will be app'arent'that :by this device on account of the plurality of clamping portions oneach sliding-member I am 'enments within Ia considerable range, without necessitating any very great ysliding m'ovementfb'etween the two members 6 and 16; itis evident that'for any given measuremerittheoperator may select two of the clamping :portions on the respective sliding members which will enable him to secure the measurement with the minimum of ad.- justment. Therefore the'instrument may be made of smallsize so thatit can be used in the mouth for dental work.

The interabled to make measurements 'and adjustmediate-clamping p'ortionon thefmember 6 f may be used for thesupport ofa supporting "leg or *the like When the instrument is used; outside the -mouth, as, forinstanceon a 'mod'el. V V

Inasmuch asmanychanges could be made in the above construction, and manyap parently widely different embodiments of my invention could be' made without departing from-the-scope thereof, it is intended scription or "shown -'in "the accompanying drawings shall be interpreted as illustrative and not a in I a limiting-sense.

that *all-mattercontained "in the above de- V It is also to be understoodthatthe-language used in the 'followingclaims is .intended' to cover all the gene'ric? and specific features of the invention herein described.

and all-statements of the scope 'oflthe invenll flaving described my invention,*what I claim: as new and desire to "secure byLeti tion which, as a matter ofilanguage, might 'be'saidto fall"therebetween. i V

' 1. In an instrument of the kind described,

two relatively sliding members, slow motion :means for moving the members relatively to 'eaeh thergeach 'member-havinga spaced plurality of tool holding portions arranged in a straight line, the two lines being parallel but separated, and one of the members bearing a line of calibrations on its edge Whereon the distance between a tool holding portion on one member and a tool holding portion on the other member may be read,

the spacing of such calibrations being such as to allow for the varying angular relations between the tool holding portions as the two members are moved relatively to each other, the other of said members having an index notch or line on its edge adjacent each of its tool supporting portions, to be used in reading the calibrations on the opposed edge of the other member.

2. In an instrument of the kind described, two relatively sliding members having fiat faces in a common plane, and having also fiat faces which are in contact during the relative movements of the members, the faces of the two members that are in a common plane bearing calibrations and index portions respectively, the face of one of the members that is in contact with a face of the other member, as aforesaid, carrying calibrations, and the other member having an index portion for reading such last named calibrations, each member having a spaced plurality of tool-holding portions arranged in a straight line, the aforesaid calibrations being intended for reading distance between a tool-holding portion on one member and a tool-holding portion on the other member.

In witness whereof I have hereunto signed my name in the presence of two witnesses.

HERMAN E. S. CHAYES. In presence of- ALDA L. MILLER, MARY H. Lnwrs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

